Embroidery-knife



L. HERZOG.

EMBROIDERY KNIFE. 3 v v APPLICATION FILED SEPI- 9.1 ms.

Patented; M y 31, 1921.

entree I stares? F TM T QFFICE-Q Louis HERZOG, or BEACON, 1\TEW Yon]:

EMBROIDERY KNIFE I To dlllwhiom it meg concern .Beitknownthat I,Louis Hnnzoe, a citizen; of United States, and. a resident of Beacon, in the county of Dutchess and State of; New York, have invented certain new and usefnl lmprovementsin Embroidery-Knives, of which the following is a specification.

My invention relates to knives and it is especially useful, in connection with the manufacture of embroidery althoughit is not necessarily limited to that, application. In making embroideries on the large or Swiss machines there are usually formed what are called jump threads; that is, where the rows of needles leave off in the making of one rapport row of embroidery and wherethey start] on a new rapport row there is a thread passing between the rows for each needlewhich forms no part of the embroidered design and these are cut, generally bypassinga knife ,hav1ng one or more jblades, between. the fabric and the jump threads to cut the'latter, while the fabric is spanned; upon the machine. Various knives have beenfmade for the purpose, mostof which. are: expensive and have to be;totally. discarded when the blade is wornIout. "Theobj 'ect of my invention is to provide knife adapted for the purpose imentioned, wherein the'blade may be ref-mo ve d. The bladeimay', be readily removed for re'sharpening' and renewal so that the whole device need not be discarded when; a

blade is worn; out. Furthermore, the blades H v v to br ng tsfr'ee end 16' ina'gainst the blade.

thin steel so that they, may be morereadily sharpened-and soihaii they will takel'a' finer edge. All these advantages are obtained in a knife which is in every way adapted for the cutting of the threads as above described.

In the drawings forming part of th1s application,

Figure 1 is a plan view of a knife embodying my invention, ready for use,

Fig. 2 is a side elevation thereof,

Fig. 8 is a similar view from the opposlte side Fig. 4 is a plan view showing the blade removed and the clamp open,

Fig. 5 is a sectional view taken on the line 55 of Fig. 1 and, I

Fig. 6 is an elevation of the blade detached.

The device consists, primarily, of a handle 1, the blade holder 2 and the blade The handle 1 may be of any shape or design and Patented- May'fit, 19215 d Application filed September 9, 19.1 8 Seriallfl'o. 2535211.

generally-it is in. line with theblade holder. 1

The handle has a shank 4, extending therefrom and the blade holder is preferably detachably s ecuredthereto. I have shown the bladeholder provided with an extensionv 5 formed by bending the holder plate atright angle at 6' and the extensionhas a slot 7 to receive a set screw 8 which is threadedin the shank 4, whereby, the holder may be slipped endwise under the head, of'the' screw 8 and then secured by tightening the set screw.

There isa screw .9 in the extension 5. which enters a slot 10in the shank 4and this pre;

ventsthe holder from twisting on the'screw ,8. The screws 8, 9, are alsoadapted for securing the holder to the combination" or multiple handles in the manner welljknown infthe art. [The forward, part of. the blade holder has a wall. 11 against, whichone side of the blade is adapted tobe' pressed and there is a, seat 12- atright anglethereto,

is d p edi o liest, ,sothatt'hef rigid portion of the holder formsa seatfortheffbackand one face of the blade.

against which the back-edge 13' oflthe blade The blade is detachably held in position by the member 14 whichpresses againstthe 'otherface of thefblade, This member. 14i i's fulcrumedto'the rigid-holderZ atLf15 so that itmay be swungin apla'ne atrightjangle to the wallll and i'preferably its bottom edge just clears/the member' 12, This member shown inFig; 4" so that-.jpressure is required When 'the end; 16 is' 'rorcedjever against the down so that it loops over the wal 11 and the I clamp 14 and holds the latter in position. When the parts are thus engaged, the blade is resilient and it"is,;'normallyl bowed as d =b1ade'itis dap edtofbeyhelrl thereby a clip i .which is here Show as'a U'shaped'plate 17' 3 is held in its seat by the frictional engagement of the clamp 14 which latter is under tension. To release the blade it is only necessary to raise the clip 17 to release the 1 clamp 14 whereupon the blade may be removed.

The forward end of the holder has a heel 20 lying at right angle to the plane of the blade and parallel with the back edge .of the holder. The blade 3 has a curved cutting edge 21 starting from the point 22 and rising upwardly, and the back edge 18 of the blade is arched as shown in Fig. 6. When the blade is clamped in position the back of the point rests against the heel 20 so that wlienthe knife is moved along under the threads the latter can not pass between the back of the knife and heel, but will be compelled to engage the cutting edge of the knife. As the knife is sharpened from time to time more or less of the pointed end will be ground away but owing to the jump threads.

The knife is'used in the same manner' as other embroidery knives. The operator places the heel :20 against the embroidered fabric with the blade 3 extending out at right angle to the fabric and she then moves the knife endwise along the line of the As each jump thread is reached the heel 20 first passes under it and the thread passes up on the cutting edge 21 until there is a slight pull on the thread, whereupon it is cut by the blade. This ac tion occurs repeatedly asthe knife is moved along the fabric.

It is a very simple matter to remove a blade for resharpening or for replacement. It is only necessary to raise the clip 17 to i release the clamp 14 and the blade is then free to be removed. With the present arrangement the blades may be made thinner than in former knives of-this character and if desired, they may be made of metal of uniform. thickness.

heel at the forward endof said holder and disposed at right angles to a blade held in said seat, a blade having a pointed end and an arched back and means for detachably securing said blade in said seat whereby the forward end of the blade will rest against said heel.

2. A device of the class described consisting of a blade holder provided with a seat for a detachable blade, a heel at the forward end of said holder and disposed at right angles to a blade held in said seat, a blade and means for detachably holding said blade in said seat whereby the forward end of the blade will rest against said heel and comprising an arched, resilient member adapted to press against said blade and means for holding said resilient member pressed against the blade. I

3. A device of the class described comarising a blade holder provided with a seat for a detachable blade and including a wall for one face of the blade, a wall for the back edge of the blade, a heel at the forward end of the holder, disposed at right angles to a blade" held in said seat, a blade having an arched back and means for detachably securing said blade in said seat so that the arched back rests against said heel and said wall.

U shaped clip hinged to said holder and adapted to straddle said first wall and said resilient member to hold the blade in position.

Signed at Glenham in the county of Dutchess and State of New York, this 4th day of September 1918.

. LOUIS HERZOG. 

